According to a report U.S.-mexico trade and job displacement after NAFTA headed south and an estimate 682,900 U.S. jobs have been lost or displaced because of the agreement.
Early civilizations always formed near rivers/river deltas. Rivers provide water, silt (fertile soil) which is good for farming, and transportation, as well as natural barriers (such as the cataracts-rapids-in the Nile) which protected the Egyptians from invasions/attacks. The Nile is also predictable in it's seasonal flooding (compared to other early civilizations' rivers), which was good for the Egyptians.
(All of those factors influenced the development of the Egyptian civilization.)
Answer and Explanation:
Patch size appears to be the main factor that compels populations in distributed habitats. Patch size is positively related to food availability and negatively related to organic evolutionary pressures, physiological stress, and parasite charge. Habitat fragmentation and disturbance on howlers depend upon identifying different threats that may affect howlers in fragmented landscapes; specification predictions developed in fragmentation and the empirical evidence also consider during predictions. Food patch size is measured by feeding spaces, S, a patch restricted for a given animal species. Structural, spatial criteria should determine the values of S. The size of the feeding aggregate is finite by the accessibility of space or by constraining behavior. S is limited by the density of food items within the patch, and may change, depending on the relative profitability of alternative patches which is available to the animal, a result deduced from simple optimal foraging theory.
